38 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.21 



6a. Interantennular spine present and conspicuous (ex- 

 cept in Euprognatha bifida) 

 7a. Eyestalks slender ; 3 erect median spines 



Arachnopsis 



7b. Eyestalks not slender 



8a. Seven long capitate spines . . Aepinus 

 8b. Fewer than 7 carapace spines 



9a. Spine of basal antennal article equally 



advanced with front . Euprognatha 



9b. Spine of basal antennal article not 



equally advanced with front . . . 



Batrachonotus 



6b. Interantennular spine absent or inconspicuous . . 



Gollodes 



5b. Rostrum single 



10a. Merus of outer maxilliped as broad as ischium, 

 palpus of moderate size 



11a. Postorbital tooth large, curving around eye 

 12a. Carapace depressed ; first leg noticeably 

 shorter than others .Paradasygyius 

 12b. Carapace not depressed ; first leg longer 

 than others .... Pyromaia 

 lib. Postorbital tooth small, or if large, not curv- 

 ing around eye 



13a. Sex dimorphism involving shape of ca- 

 rapace, size and location of postorbital 

 spine. Male cheliped extremely elon- 

 gated Erileptus 



13b. Sex dimorphism not involving shape of 

 carapace, size and location of postor- 

 bital spine. Male cheliped not of un- 

 usual length 



14a. Carapace rough with spines and 

 tubercles; legs not subprehensile 



Anasimus 



14b. Carapace smooth; legs subpre- 

 hensile . . . Inachoides 

 10b. Merus of outer maxilliped often narrower than 

 ischium, palpus large and coarse 



